 
Flyback Transformers
for
Texas Instruments TPS23750
| New RoHS part numbers are shown.
Lead was removed from terminations. The second to the last character is now L to
indicate RoHS compliance. (View old data sheet.)
|
- Developed for TI TPS23750 PoE PD controller
(PMP929 reference design)
- Isolated, synchronous flyback transformers for
IEEE 802.3af PoE applications
- 18 – 72 V input
- 10 V, 20 mA bias winding output
- 1500 Vrms isolation from the primary and bias windings to the
secondary
- RoHS-compliant 260°C compatible. Tin-silver over tin over nickel over phos bronze terminations
 Photo  Pricing 
Materials declaration 
PDF data sheet
SPECIFICATIONS
 Dimensions  Schematic 
Tape and reel specifications
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C1173-AL_ |
166.5 |
150.0 |
0.770 (pri)
0.020 (sec)
0.523 (drive)
1.12 (bias) |
2.5 (pri)
0.40 (drive) |
pri : sec
pri : drive
pri : bias |
6.5 : 1
3.7 : 1
2.0 : 1
|
1.2 |
3.3 V, 3 A |
5.6 V, 10 mA |
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C1174-AL_ |
150.0 |
135.0 |
0.515 (pri)
0.023 (sec)
0.570 (drive)
0.88 (bias) |
2.0 (pri)
0.40 (drive) |
pri : sec
pri : drive
pri : bias |
5.0 : 1
3.2 : 1
2.25 : 1 |
1.2 |
5.0 V, 2 A |
7.5 V, 10 mA |
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1 |
When ordering, please
specify packaging code: e.g. C1174-ALD |
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Packaging: |
D = 13"
machine-ready reel
EIA 481 embossed plastic tape (200 parts per full reel).
B = Less than full reel
In tape, but not machine-ready. To have a leader and trailer added ($25
charge), use code letter D instead. |
|
2 |
Inductance is for the primary, measured at 100 kHz, 0.1 Vrms, 0 Adc |
|
3 |
Ipk is the peak
primary current drawn at minimum input voltage. |
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4 |
DCR for secondary
is for the windings connected in parallel. |
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5 |
Leakage inductance
for the primary is with the secondary and drive windings shorted; leakage inductance for the drive winding is with the secondary windings shorted. |
|
6 |
Turns ratio is with
the secondary windings connected in parallel. |
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7 |
Output for the secondary is with the windings connected in parallel. |
| 8 |
Ambient temperature range: |
–40°C to +125°C |
| 9 |
Storage temperature range: |
Component: –40°C to +125°C
Packaging: –55°C to +80°C |
| 10 |
Resistance to soldering heat: Three reflows at >217°C for 90 seconds (+260°C ±5°C for 20 – 40 seconds), allowing parts to cool to room temperature between. |
|
11 |
Electrical specifications at 25°C. |
| Refer to Soldering Coilcraft Components before soldering. |
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